superluminal radio source

superluminal radio source

[¦sü·pər¦lüm·ən·əl ′rād·ē·ō ‚sȯrs]
(astronomy)
A radio source whose velocity appears to exceed that of light.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.